At the moment it's 2,40 m x 0,35 m. An extension segment in the middle is already planned to lengthen all. To the left and right small extensions boards are attached, about 0,5 m long and with a width for only one track - so op sessions are already possible. More modules will come when my layout room is usable.
The UP flat car has a brake pipe hose but the Fox Valley GP60M doesn't have one. Seems like the 60M should have them as Fox Valley usually has way more details than other makers.
That bricked up loading dock door is one of the best modeling jobs I have seen in a while. My friend is working on a southwest layout now, so I'll send him a link to this thread as inspiration. Good luck with the extension!